By E. Chiellini, T. Corner, J. V. Crivello, G. Galli, T. Higashimura, A. Ledwith, M. Sawamoto, R. Solaro
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Macromolecules 1993, 26, 7372. Eisenbach, C . ; Schubert, U . Sci. 1998, 276, 780. , J. Chem. , Chem. Commun. 1996, 2639. , Macromol. Chem. Phys. 1997, 198, 2789. , Macromol. Chem. Phys. 1998, 199, 127. ,Macromol. Symp. 2001, 163, 157. , e-Polymers 2002, no. 001. , Polym. Preprints 2004, 45(1), 480. ; Saab, Z . ; Dietrich-Buchecker, C. , J. Am. Chem. Soc. 1985, 107, 3205. Dietrich-Buchecker, C . , Tetrahedron Lett. 1983, 24, 5091. Hawker, C. ; Fréchet, J. M. , J. Am. Chem. Soc. 112, 7638 (1990).
Representative procedure for [Fe ] determination. 4 m M stock solution of iron(II) tetrafluoroborate in C H O H was prepared in a 25 mL volumetric flask. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2006. 159 mmol) in 75% C H C l / 2 5 % C H O H . 1 m M Fe , 75% C H C l / 2 5 % C H O H v/v solution. The iron solution was spectrophotometrically titrated with the bipyridine solution via a microliter syringe in 10 μ ί aliquots. Absorbances were corrected for dilution and plotted versus equivalents added.
Table 1). Bpy values for a given counterion are typically slightly lower than those for polymeric complexes, so chelation efficiency slightly overestimates the extent of reaction. Ways in which ε values are affected by high molecular weight materials is not known. 26 Macintyre, J. E . ; Dictionary of Inorganic Compounds; Chapman & Hall: New York, 1992; V o l 3. 27 Johannson, L . Chemica Scripta 1976, 9, 30. 28 Johannson, L . Chemica Scripta 1976, 10, 72. 29 Johansson, L . Chemica Scripta 1976, 10, 149.